[Thought experiment] If alignments are objective how do we know what they represent?

[Tanarii]

This only works if you have an axiomatic assertion that "good is moral."

If I had to guess, that is probably an assertion, or definition, in IRL moral theory. Good = Moral, and possibly also = the correct/right "way to behave"/"thing to do".

Good = Moral is not how D&D or Palladium define any of the good Alignments. And the most recent version describes Alignment as moral & social attitudes that results in typical behavior.

If so, that means we know that some portion of the Alignment name labels, e.g. Good and Evil, isn't lining up with IRL Moral Theory.